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From "Appu K (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-18784) Managed memory leak - spark-2.0.2
Date Thu, 08 Dec 2016 11:33:58 GMT
Appu K created SPARK-18784:
------------------------------

             Summary: Managed memory leak - spark-2.0.2
                 Key: SPARK-18784
                 URL: https://issues.apache.org/jira/browse/SPARK-18784
             Project: Spark
          Issue Type: Bug
    Affects Versions: 2.0.2
         Environment: spark : 2.0.2
            Reporter: Appu K


I’ve just ran into an issue where the job is giving me "Managed memory leak" with spark
version 2.0.2

—————————————————
2016-12-08 16:31:25,231 [Executor task launch worker-0] (TaskMemoryManager.java:381) WARN
leak 46.2 MB memory from org.apache.spark.util.collection.ExternalAppendOnlyMap@22719fb8
2016-12-08 16:31:25,232 [Executor task launch worker-0] (Logging.scala:66) WARN Managed memory
leak detected; size = 48442112 bytes, TID = 1
—————————————————


The program itself is very basic

Program: https://gist.github.com/kutt4n/87cfcd4e794b1865b6f880412dd80bbf
Debug Log: https://gist.github.com/kutt4n/ba3cf8129999dced34ceadc588856edc


TaskMemoryManager.java:381 says that it's normal to see leaked memory if one of the tasks
failed.  In this case from the debug log - it is not quite apparent which task failed and
the reason for failure. 

When the TSV file itself is small the issue doesn’t exist. In this particular case, the
file is a 21MB clickstream data from wikipedia available at https://ndownloader.figshare.com/files/5036392

Not sure if it is a duplicate of 18181 - If so please close this and could track it there




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